HP 381803-001 - System board assembly - With two single-core heatsinks, two dual-core heatsinks, and LED board - For Dual-Core AMD Opteron processor support Retail
HP 874737-001 - System board assembly with AMD Opteron 2-core X3216 Accelerated Processing Unit - 1.6GHz, 15 watt thermal design power - Includes the system board attached to the tray, heatsink, rear USB EMI shield Retail
HP 874738-001 - System board assembly with AMD Opteron 4 core X3421 Accelerated Processing Unit - 2.1GHz,35 watt thermal design power - Includes the system board attached to the tray, heatsink, rear USB EMI shield Retail
HP 518702-001 - System board (motherboard) - AMD dual-core processor supported, M96/1GB graphics memory Retail